Typewriting-machine casing



Feb. 5, 1.929. 1,700,941

' A. G. F. KUROWSKI TYPEWRITING MACHINE CASING Filed Dec.ll, 1924 2 Sheets-Sheet l Feb. 5, 1929. v 1,700,941

A. G. F. KUROWSKI TYPEWRITING MACHINE CASING Filed Dec. 11, 1924 2 Sheets-Sheet 2 Patented Feb. 5, 1929.

UNlTED STATES PATENT OFFICE.

ALFRED G. F. KUROWSKI, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNDERWOOD ELLIOTT FISHER COMPANY, OF NEW YORK, Y., A CORPORATION OF DELAWARE.

TYPENRITING1\IACHINE CASING.

Original application filed September 27, 1922, Serial No. 590,758, new Patent No. 1,570,309, dated January 19, 1926. Divided and this application filed December 11, 1924. Serial No. 755,137.

The present invention relates to sounddeadening cases for typewriting machines, and is a division of my (Jo-pending application, Serial No. 590,756 filed September 27, 1922 (now Patent No. 1,070,309, dated. January 19, 1926). These cases are usually made of a body-part and a cover, the body-part having a front opening therein through which the keyboard-extension of the machine may project and the cover being hinged near the top of the rear wall of said bodypart and arranged to be swung open rearwardly to permit access to the machine for erasures and other purposes.

A feature of the invention is the provision of a cover-opening spring-device, which may be of any desired strength or force, while requiring but little space for its movements and housing. In this connection, a feature of the invention is the use, between the spring-opening device and the cover, of means for amplifying the motion of the spring-device, so that an ample cover-open,- ing movement may be had with small movement of the spring-device, and so that, small movement of the spring-device being required, the same may be in the form of a relatively heavy coil-spring, conveniently housed by telescoping members.

Another feature is to provide means for holding the cover in its closed position, said means including a hook pivotally connected to the cover and arranged to engage a device on the body-part to hold the cover in its closed position.

Another feature is to provide means for readily releasing said hook to allow the coveropening spring-device to automatically open the cover.

Other featiinres and advantages will here inafter appear.

In the accompanying drawings Figure 1 a view, in front elevation, part ly in crc section, of the casing; the heyboard- .nsion of a typewriting machine being shown untruding through the front wall of the cas ng.

Figure 2 is a view, in cross-sectional side elevation, taken on the line 2-2 of Figure 1.

Figure 3 is a to plan view of the casing, the cover being broken away to show the cover-opening element and its associated parts.

Figure 4 is a view, in cross-sectional side elevation, through, the cover balancing or opening device; the parts being in the position assumed when the cover is closed.

Figure 5 is a view, in cross-section, on the line 5-5 of Figure 4.

Figure 6 is a View, in side elevation, of the cover opening or balancing device and its connections to the casing body and cover, with the cover in open position.

The casing is in two principal parts, to

it, a body-portion 10 and a cover 11; the cover being hinged at 12 at the rear thereof to the body-portion to swing from Figure 2 to Figure 6 position. The rear, front, and side walls of the casing-body are lined with sound-deadening material 18. The front wall of the casing is cut away, as at 14, so that the keyboard-extension 15 of the typewritmachine 16 may protrude therethrough.

As shown in Figure 1, the casing is flared laterally upward and outward on the lines 17, to provide room in the top thereof for movement of the platen-carriage in letter feed and return directions. The flaring side walls 17 terminate, at their upper ends, in horizontal overhangs 19, the ends of which are turned upward, to form flanges 20. The left-hand overhang 19 is wider than the right, to serve as a platform for a cover-opening spring-device. This device comprises a coil-spring (see Figure 4), enclosed in a housing, consisting of two telescoping sleeves 23 and 24; the spring hearing, at one end, on a head 25 of the housinganember 23, and hearing, at its other end, against an adjustable head 26 in the housing-member 24. The housing-member 24 has, at its forward end, a head 27, fixed therein by pins 28; and, pass ing horizontally through the head 27 (see Figures 4 and 5), is a hinge-pin 29, set and threaded into a block 30, secured by screws 31 to the over-hang 1.9 of the casing-body at the up per left-hand side of the latter, The housing as a whole may, therefore, have an up and down pivotal movement around the pin On the head 25 of the housing-member 28 is formed an arm 32, pivotally connected at 33 to an arm 34, which, in turn, is pivotally mounted at on a bracket 41, also set upon, and suitably secured to, the overhang 19 of the casing-body. The arm 34 carries a pin 42, on which is a roller 43, adapted to Work in a slot 44 in an arm 45, forming part of a bracket 46, secured by screws 47 to the sheeting of the cover 11, and at the rear of the latter. The coverlining-meinber 13 is slotted, as indicated at 48, to receive the bracket-arm 45.

The spring'22 is compressed when the cover is closed, and, consequently, tends to force rearward arm 32, arm 34: and bracket-arm 45, to swing the cover rearward around the hinge 12. and upward, in the opening operation, causes the housing 23-94 to swing upward on its pivot 29, as indicated in Figure 6. The slot 44; is so directed as to permit of the pivotal movements of the cover and springdiousing; while providing for the direct presure of the roller 43 on the bracket-arm if). The lower rear end wall of the slot i l serves as a stop to determine the throw of the cover in the opening operation.

To serve as a brake or cushion, to prevent shocks to the cover, when the same is arrested in the opening operation, there is a leafspring 49, set in the cut i8 in. the lining-meniber, and secured to the bracket 46 by a screw 50. At the end of the pin is a collar 51, against which the leaf-swing d9 is caused to bear with increasing pressure as the cover is opened. In other words, the upward move ment of the cover, in the opening operation, brings the bellied portion of the leaf-spring (see Figure 6) into braking and lending en ga 'ement with the collar 51,550 that the cover is brought to open position smoothly and noiselessly. The collar 51 may be eccentric, and angularly adjustable on the pin &2, for adj ustment of the tension of the spring ll).

The tension of the spring 22 in the housing is adjusted by varying the position of the head 26 therein. For this purpose, the head 26 is secured to a block 52, in threaded engagement with a stud The stud 53 is held in the front head 27 of the housing, against longitudinal movement therein, by means of collar 54, set into a recess in the stud, against the inner face of the head 27, and a collar 55, secured by key 56 to the end of the stud, at the outer face of the head The collar has pinholes 57 therein, to receive a pin, by means of which the collar, and, consequently, the stud 53, may be turned, to move the head as in one or the other direction. To prevent the head :26 from overriding the inner end of the stud 53, the latter ias a headed screw 59 set into the inner end thereof.

F r locking the cover against the action of the spring-device, just referred to, there 1s pivoted at 60, to one of the side walls of the cover, a hook 631, which depend into the body-portion of the casing. Vhen the cover is shut and the hook 61 is swung forward,it engages a detent 62, carried. by the casingbody. Mounted to be slid rearward and forward in the front wall of the casing-body a pin 63, carrying on its outer end a lingerpiece 64, and having on its inner end a head The cover in swinging rearward '66 being on the cover, and the other from the detent 6:2 and releases the cover to the action of the spring 22.

in order that the hook may not be injured by the typewriting machine, in the operation of removing the latter from the casing, and may not be struck by the operator, or otherwise bent or injured, it is set in a housing. This housing is in two sections, one se ition section 67, which forms a continuation of the section (56, being on the casing-body. As shown in Figure 2, the housing 66 is a punchedpress piece in the form of a pan, set edge-on to the casing-cover against bushings, staked or riveted on the side wall of the cover; and anchored to such bushings by screws (38, which pass through the bottom of the pan and thread into the bushings. The lower side wall of the pan has an. opening 69 therein, through which the hook 61 passes, and within whicn the hook may swing. A leaf-spring 70, secured at one end to the rear of the hook 61, and at its other end bearing against one of the bushings, acts to throw the hook for ward into cover-locking position. The releasebutton-housing 67 is also made of a punching, and is secured to the flange 20 of the body-portion of the casing by two flathead screws 71. The front and rear walls of the housing may serve as stops to limit the throw of the hook.

Referring to the cover-opening device, will be noted that the length of the arm between the pivot ll) and the roller 43 is greater than the length of the arm between the pivot 4:0 and the pin 33. In other words, the arm 34 serves to amplify the n'ioveinent received by it from the member and the coveroperating arm fi'receives a greater motion than does the arm To eff ct an ample movement of the cover, a relatively small movement of the spring-actuated arm 32 is, therefore, required. Since the spring needs but slight expansion in the cover-opening operation, the spring may be made of a size and strength to perform its function effectively. Furthermore, the space required for the expansion of the housing, and for the swing of the housing on its pivot, may, by reason of the aiiiplif 'iin arm 3i, be less than would otherwise be required to give the cover its full opening movement.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a sound-deadening casing for a type writing machine, having a body-portion and a swingable cover, a spring-actuated arm secured to the casing-body, a second arm pivoted to the body-portion of the casing, and

having connections, at different radial distances thereon, to the spring-actuated arm and the cover, to cause the movement- 01": the springactuated arm to be amplified, an adjustable buii *---elem at carried at the tree on d oi the second, arm, and a buffer engaging said element in gradually increasing tension the cover swings open.

In a sounddcadening casing for a typewriting machine, having a body-p n and. a swingable cover, a spring-anti:atcd arm :--.ecured to the casing-bot y, a slotted tongue on the cover, a second arm pivoted to the casinghody, a pin on the second arm engaging the slot in the tongue on the cover, a pivotal conrection of the spring-actuated arn'i to the second arm an eccentric element carried by the econd arm, and a butler engaging said elenent as he cover swings open, said ciement t ble to vary the tension exerted ,br' a sound--dc:ulening casing for a type-- i'uachine, having a body-portion and 7 l 2. spring-actuated arm. -1ccured to t re casingdaody, a. slotted tongue on the cover, a second arm pivoted to the casing-- body, a pin on the second arm engaging the lot in. the tongue on the cover, a pivotal connection of the spring-actuated arm to the second arm; said pivotal connection of the spring-actuated arm to the second arm being at shorter radial distance from the pivot t L431 than the pin thereon tor engage- L in said slot, a buffer in the form ot a ng carried by the cover, and an ec- 1c disk adjus able about said pin and en- 7 k, 'l loaf-spring as the cover swings open, the t ision of said leaf-spring being controlled by the adjustable eccentric.

4:. In a sound-deadening casing for a typevxriting machine, having a body-portion and a swingable cover, a spring-actuated arm cured to the casing-body, a slotted tongue on the cover, a second arm pivoted to the casinghody, a pin 0}? the second arm eng' ng the slot in the tongue. on the cover, a pivotal con nection. ot the s Ji'ingactuatcd arm to the second arm, an eccentric d mi angularlv j ustable on said pin, and a spring engageahle with said disk, for cushi the coveropcuing OpOltltiOU.

5. in a sound-deadcuing c: g for a typewrit 'ig i'i'iachine, having a bill, -portio22 and a cover hinged thereto, a spring-actuatcd arm secured to the casinghotly. a slotted tongue on the cover, second arm pivoted to the cas- 23. .ii writ ng a swmgaoio cover,

ing-hody, a pin on the second arm engaging the slot in the tongue on the cover, a pivotal connection of the spring-actuated arm to the second man, and a leaf-spring on the cover adapted to be engaged by the pin on the second arm, to cushion the cover-opening op oration.

6. In a soLind-deadening casing for a type- Writing machine, having a bodyportion and a swingahle cover, a cover-opening device including a telescoping housing containing a coil-spring, an extensibl element propelled by the spring, an arm pivoted to the casing. means connecting the ostensible element of the spring-housing and the cover to said arm, and other means connecting the cover to said arm.

7. In a sound-deadening casin tor a type v-iriting machine, having a body-portion and a cover hinged thereto, a. spring-device for opening the cover comprising a housing of two telescoping sleeves, a coil-spring within the housing, hearing at one end against one member of the housing, and at its other end against a collar Within the other element oi? the housing, a head in such other element of the housing, a turn-screw set in said head, in threaded engagement With said collar-hearfor the spring, and means for turning the screw to adjust the tension of the spring.

8. In a sound-deadening casing for a typewriting mac iine, having a hotly-portion and a cover hinged thereto, a cover-opening device comprising a telescoping housing pivotally connected to the casing-body, and containing a coil-spring for expanding the same, an arm pivoted to the casing-body, and means pivotally connecting the arm to the expansible member of the housing and to the cover.

In a sound-deadening casing for a type- Writing machine, having a body-portion and cover hinged thereto, a spring-actuated arm secured to the casing-body, a slotted tongue on the cover, a second arm pivoted to the casing-body, a pin on the second arm engaging the slot in the tongue on the cover, a pivotal connection of the spring-actuated arm to the second arm, an eccentric collar on the pin, a Treat-spring on the cover adapted to be engaged by the e centric collar, to cushion the cover-opening operation. and means tor adjusting the angular setting oi the eccentric collar on the pin, to vary the tension of the cushion-spring.

ALFRED G. F. KUROXVSKI. 

